| 摘要 |
PURPOSE:To enable stable insertion and hoisting of a removing device into and from a pile even if waves are high, by a method wherein, after a guide rod provided at its lower end with a central holding member is inserted into a cylindrical pile, the guide rod serves as the guide of a pile cutting and removing device. CONSTITUTION:When a cylinder pile 3, driven into a ground, is cut from the inside for removal, a guide rod 2 provided at its lower end with a holding member 1 is first inserted into the cylinder pile 3. Secondly, a pile cutting and removing device 10 is engagedly mounted to the upper part of the guide rod 2, and after the removing device 10 is inserted into the cylinder pile 3 with the aid of the guide rod 2 serving as a guide, a clamping device 9 is pressed against the inner surface of the cylinder pile 3 to secure the removing device 10. Through revolution of a pile cutting tool 5 of the removing device 10, the cylinder pile 3 is cut, and the removing device 10 is hoisted with the aid of the guide rod 2 serving as a guide in a state that a cut pile 7 is clamped by the clamping device 9. |
